Leaves. In. Spaaaaace!
Fantastic artwork, colour schemes and menu design.
Gameplay is lacking, though. Adding gravity to the planets would make the game more fun since we'd be able to make slingshot manoeuvres.. and actually orbit the planets as the name suggests. In addition, keeping the predicted trajectory line in place while the ship is in motion for the second and subsequent player clicks would greatly reduce the frustration of playing the game, since it's very hard to send the ship in the right direction without that line to guide you.